Concrete building-block.



0. T. HUNGERFORD.

CONCRETE BUILDING BLOCK.

APPLICATION FILED OCT- 2. l9l4.

Patented Aug. 13, 1918.

- INVENTOR. I 6 7 w I $9M ATTORNEYS,

OLIVER, '1. HUNGERFORD, OF BELLEVILLE, NEW JERSEY.

CONCRETE BUILDING-BLOCK.

Specification of Letters Patent.

. Patented Aug. 13, 1918.

Application filed October 2, 1914. Serial No. 864,649.

To all whom it may concern Be it known that I, OLIVER T. HUNGER- FORD, a citizen of the United States, residing at Belleville, Essex county, and State of New Jersey, have invented and discovered certain new and useful Improvements in Concrete Building-Blocks, of which the following is a specification.

My said invention consists in certain improvements in the details of construction of concrete building blocks of that type wherein the faces of the blocks are formed to contain interlocking securing means within the surface, when in place in the wall, whereby such a construction is provided by the use of which a very secure connection between the adjacent blocks is made possible and at the same time a solid and substantial wall secured, all as will be hereinafter more fully described and claimed.

Referring to the accompanying drawings which are made a part hereof and on which similar reference characters indicate similar parts,

Figure 1 is a perspective View of a building block of my improved construction showing the top and one end and the front, or outside surface, thereof, and

Fig. 2 a detail view showing one end underside and outside surface thereof.

-The block is molded of concrete and of the form shown, corner blocks being made of the requisite angle, and of the same con struction, so far as the features constitutingzmy invention are concerned.

, look A .is formed with a series of V- shaped groovesor corrugations a which are spaced equi-distant apart and extend entirely around the block, being formed both in its top, its bottom, and each of its ends, and are continuous and independent each of the other. The surfaces 10 of the block between .said grooves, or corrugations, are of a considerable width and flat and in the same plane as the surfaces 11 of the portions of the block outside of said corrugations, thus affording an equally distributed and firm bearing surface between adjacent blocks throughout the entire width of their bearing faces and ends with the exception of the spaces occupied by the V-shaped grooves, which cut into said surfaces at intervals, as shown.

The grooves a and the surfaces of the intervening spaces 10 are of equal width throughout the length of the block, and the surfaces of the side portions .11 are of greater width than the widths of the surfaces 10. This arrangement allows the blocks to have a setting surface of appreciable width adjacent the surfaces of the wall: built by the blocks.

In building a wall said grooves a of one block register with like grooves in adjacent blocks and are filled with mortar, which, when it becomes set, forms a very secure connection between the respective blocks and enables a wall to be constructed which, when finished, is for all practical purposes of substantially the same solidity and resisting powers as if made as a single block of concrete. The surfaces 10 and 11 of each block rest firmly and closely upon the like surfaces of adjacent blocks, and the mortar is held within grooves and at regularly spaced intervals throughout the width of the surface, thus enabling a wall to be built the parts of which are most rigidly tied together and as a whole is capable of resisting great pressure from every direction.

Having thus fully described my said invention what I claim as new and desire to secure by Letters Patent is:

A concrete building block formed with a series of V-shaped grooves in its contacting surfaces extending completely around the block and uniformly spaced apart to provide therebetween a series of contacting surfaces of uniform width, said intervening spaces and the V-shaped grooves being of equal width throughout, the contacting'surfaces between the endmost grooves and the edges of the block being of greater width than the width of the contacting surfaces between the grooves, and the several contacting surfaces on each face of the block lying in the same plane, substantially as set forth.

In witness whereof, I have hereunto set my hand and seal at Washington, D. (3., this 1st day of October, A. D. nineteen hundred and fourteen.

Witnesses:

E. W. BRADFORD, T. A. BRADDOCK. 

